Bake-oven-illuminating means



July 27 1926.

J. c wooDsoN BAKE OVEN ILLUMINATING MEANS Filed June 15, 1924 INVENTORJames Ghbaason WITNESSES:

Patented July 27, 1926 by 94, 39- l 1 UNITED s-TATEsrA TE T vmea JAMES0.. WOODSON, or EAST PITTSBURGH, rEivnsYLvAnra; 'nssreiroa TO wnsrnve-HOUSE ELECTRIC & MANUFACTURING coirrrnnyyn conronntrro ror rEunsYL-VANIA.

AKE-o fr iv-irinuivrfnvn'i live Applicationl filed June 13,1924. i seenNo. 719,789.

My invention relates to heating ovensand particularly tofmeans forilluminating the same.

The'object of myinvention is to provide an illuminating means j forheating ovens that is so constructed and arranged that it i maysatisfactorily illuminate the interior of a heating oven while retainingsubstantial protection from the effects of the heat of the oven. i

In practicing my invention, heating ioven of any well knownconstruction, having an opening in one of the oven walls. I he openingis covered at its interior naterial such aspyrax. Ajcasing is located onthe. outer surface ofsthe wall in such manner that a lamplocatedwithin'the caisin ma direct li ht ra s throu h the o en-' n y. ay a: P

ing to illuminate theinterior of the oven.

A door islocated adjacent to the casing,

and an arrangement is provided tooperate a switch tolcloseand'interr'upt' the" circuit supplying the lamp with current, pon [theclosing and the opening of the door.

. In the single sheet of drawings, f

Figure li's a front elevationalview 1 for a heating oven embodyingmyinvention, parts being broken away; ,Fi'g. 2 is a View in horizontalsection of anilluminating means embodied in my invention; and Fig. .8 isa view in vertical section thereof. A heating oven 11 of any well knownstructure comprises a plurality of walls 12 composed of heat insulating;material that enclose a heating chamber (not'shown). A door 13 islocatedin, and pivotally sup-' operating position. Two latches 18 and19' .of any well known structure are actuated by handle 21in the usualmannerto permit opening of door 13 and the locking thereof in closedoperating position. i

In one of the walls 12, preferably that which includesdoor 13, a portionof the wall 12 is broken away to provide an openlng 22 provide a"munication with wall 12. and exterior extremities by transparenttherethrough thatis enclosed by transparent members 23and24. Thetransparent members23 and 24 are composed of material that retains itsformand transparency under the effects of heat and are secured to'wall12 by bolts 25 and 26.",

A metallic casing secured'to the lilby bolts 26' andis located overv theopen ing22 insuchmannerv that it completely covers .the "same, anopening on the interior surface of" the -casing belng provldedwherebytl'ie interior of the casingfisin "direct com the opening 22 in the 1 Alamp 281s dispbsd' within thecasing 27 andsecurfed to, the bottomthereofin any suitable manner. In thepreferred embodi- 'ment, :an insulatingbase member 29, is secured by boltsBO to the casingf27 and "the lampsocket is mountedthereon. ."Cohductors 31 and 32am connected toafsourc'e of current (not shown) one conductor 31 being connected to thelamp 28as at 33. Conductor 32 is connected to a terminal member of a.spring switch member The spring switch 35 isar'ranged, when actuated inamanner hereinafter vmore ,fully described, to makea contactwithterminal- I member 36 that is connected by conductor 3'? to theremaining lamp terminal 38, thereby connecting the lamp 28- in circuitwith the source of electrical current. members 34 and 36 are supportedin any Contactorl well known manner on an insulator member 40, thatjissecured to insulating member 29-.

fixed to wall 12'by bracket '46.- Spring 47 engages insulating tipmember 42 and nor mally urges a, pivotal movement of lever 44 aboutpivot 45 to engage the spring switch 35 and force it into contact with.contactor 3 i A projection 48 its. closed operating position. In thisposition, lever 44' is so pivoted about pivoti45,

that insulating tip member 42 compresses .spring 47 and is withdrawnfrom spring switch '35 thereby interrupting'theelectric circuit andpreventing flow of current to the lamp, "When the door 13 is open thedoor of door 13' engages-anemtension 49 of lever 44 when the door-1s inprojection 48 disengages from lever extension 49 thereby permittingspring 47 to force lever 44 against spring switch which, in turn,contacts with contactor 36 to close the circuit and energ zes the lamp28.

A reflector- 51 is mountedin casing 27 in such manner that light fromlamp 28 is projected through transparentmembers 23 and 24 and serves toilluminate the enclosure of the walls 12.

It is obvious that this structure provides a simple and practical meansfor illuminating the interior of a heating oven and that it is soarranged that'the illuminating means is amply protected from heat of theoven, thereby prolonging; (is life of the illuminating means andensuring its practical operation.

Various modifications and changes may be made without departing from thespirit and scope of the invention, and I desire therefore that only suchc limitations shall be placed thereon as are imposed by the prior art orare set forth in the appended claims.

I claim as my invention:

1. In an electrically heated device, the combination with, an ovenmember comprising a plurality of wall members enclosing an oven chamberhaving 'a door member associated with one of said wall members andhaving an opening in said wall adjacent said door, of electricilluminating means associated with said opening comprising an electriclight bulb, switching means therefor normallybiased to the open positionfor deenergizing said lamp and pivotally mounted means adapted to engagethe door when said door is closed and so biased as to hold saidswitching means closed when said door is open.

2. An illuminating means for an oven member, having a pivotally mounteddoor in one wall thereof and an aperture in said wall adjacent saiddoor, comprising a member of box shape mounted over said aperture,having a light bulb mounted on an insulating base therein and a switchfor said light bulb adjacent thereto mounted on a second insulatingbase, said switch being biased to the open position, a reflector somounted as to direct the light from said bulb through the aperture, anda pivotally mounted member so biased as to engage and to hold the switchclosed when the door is open and to engage the door when said door isclosed thereby permitting the switch to return to said biased position.

An illuminating means for an oven member, having a pivotally mounteddoor in one wall thereol and an aperture in said wall adjacent saiddoor, comprising a member of box shape mounted over said aperture,having a light bulb mounted on an insulating base thereon, a switch forsaid light bulb adjacent thereto, mounted on a second insulating base,said switch being biased to the open position, a reflector so mounted asto direct the light from said bulb through the aperture and a pivotallymounted member oi substantially L-shape, having aninsulating block onone leg thereoi that engages said switch, so biased as to engage and tohold the switch closed when the door is open and to engage the door whensaid door is closed thereby permitting the switch to return to saidbiased position.

In testimony whereof, I have hereunto subscribed my name this 27th dayof May JAMES C. WOODSON.

